Crimped fibers, filaments, and threads



Dea. 30, 1952 H. M, HEMMI "BRIMPED FIBERS, FILAMENTS, AN-D THREADS Original Filed No`vr`23, 1946 2 SHmTS--SHEE'I 1 FIG.

.0 IYA g C O I Q @gwc n m r@ Hons Morin Hemmi Attorney Dec'. 30, 1952 H. m.-v HEMMI 2,523,266

@Humm FIBERS. FILAMENTS, AND THREADS original Filed Nov. as.. 194s 2' 2 FIG. 2

d 2 2 n C/ d FIG. 5

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SMQ/WM Hans Martin Hemmi,

Attorney Patented Dec. 30, 1952 CRIMPED FIBERS, FILAMENTS, AND THREADS Hans Martin Hemmi, Basel, Switzerland, assignor to Sandoz Ltd., Basel, Switzerland, a Swiss firm Original application November 23, 1946, Serial No. 711,928. Divided and this application April 9,

1948, Serial No. 19,907.

cember 10, 1942 Claims.

This application is a division of my patent application Ser. No. 711,928, led on November 23, 1946, which is a continuation-impart application of my patent application Ser. No. 514,178 of December 13, 1943, now abandoned.

'Ihe present invention relates to a process and to an apparatus for the manufacture of crimped bres, of all kinds and of any suitable material as stated below having a high crimping degree and which may be destined for further use in view of producing an association of fibres.

With-the expression fibres reference is also made to laments, threads and association of bres The materials, of which such bres are made, may be natural ones, for instance hair, cotton, etc., or synthetic ones such as for instance regenerated cellulose, proteinic fibres, such as lanital, a synthetic high polymeric substance, a, thermoplastic material, glass, silicon, metals, natural or articial silk, etc.

The fibres hitherto known which were crimped in a mechanical manner and which are used as such for the production of an association of fibres always possess sinusoid or spiraloid crimpings. However, it has been found that fibres having a meander-like crimping have a much more wool-like character than fibres with sinusoid orA spiraloid crimpings.

The expression crimping has a well known technical signification and is determined by the crimping number and crimping degree. The crimping number indicates the number of the crimping present in a length of 1 cm. and is dem tei-mined on a bre in unstretched condition by counting the crimping arcs. The crimping degree indicates the relation between the length of a nbre in stretched form and the length of a fibre in unstretched form.

Withthe expression meander-like reference is made to a winding line consisting substan tially of circular or nearly circular line portions corresponding to more than half a circle but less than a complete circle and which are joined together in such a manner that there will'be turning points between two consecutive circle portions which can lie in the same or in diierent planes.

The primary object of the present invention is to impart to the fibres or the like to be treated a meander-like crimping by means of an appa- In Switzerland De- ,l their form during or after the crimping operation for instance by means of hardening agents, such as formaldehyde, or by agents to be hardened, for instance watersoluble synthetic resin precondensation products, such as phenoplasts, arninoplasts or alkylol carbamides, like monoor dimethylol urea, according to the material of which the bres are made.

AAnother object of the invention is to realise a process for imparting to the fibres or the like a meander-like crimping. Another object of the invention is to realise a crimping apparatus with which it is possible to impart to the libres or the like a meander-like crimping.

Still another object is to realise bres or the like having a meander-like crimping and being stable to boiling in 'alkaline soap solutions.

I Other objects and advantages of this invention will become apparent from the following dew scription taken in connection with the acornn panying drawings, in which:

Figure 1 is a longitudinal section of a crimping apparatus of which the middle part is broken ra, b and c, d, the sprocket wheels a1, b1 and c1, d1

of which are xed on four correspondingly arranged shafts e, 7 and h, one of which is ex,-

v tended to one side and forms at the same time "the driving shaft of the apparatus.

The chain locks of all the link chains are provided with exteriorly projecting supporting arms a2, b2 c2, d2 which for corresponding chain locks axially aligned of the chains a, b or c, d respectively are interconnected by means of cross bars m or n respectively of circular cross section. Thus, as can be seen from Figures 1 and 2, the apparatus shown therein, comprises two superposed caterpillar-like chain assemblies the cross bars m and n which engage each other from opposite sides when the apparatus is running. In this manner REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Cutter Dec. 21, 1875 Wessel Mar. 6, 1894 Wessel Feb. 6, 1900 Number 1,427,056 Breen Aug. 22, 1922 A Ray June 6, 1916 g5 Number Number Name Date Kronheim Feb. 2, 1937 Dreyfus July 23, 1940 Clawson Aug. 5, 1941 Hull Dec. 2, 1941 Dookerty Mar. 9, 1943 Getaz Feb. 5, 1946 Browne May 23, 1950 Page June 24, 1952 FOREIGN PATENTS Country Date Great Britain Aug. 3, 1933 Great Britain July 7, 1936 Great Britain Aug. 18, 1937 

